نتایج جستجو برای: photo switch

تعداد نتایج: 88323  

Journal: :amirkabir international journal of electrical & electronics engineering 2015
m. hayati s. roshani

a new output structure for class e power amplifier (pa) is proposed in this paper. a series lc resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. this resonator causes low impedance at the second harmonic. the output circuit is designed to shape the switch voltage of the class e amplifier and lower the voltage stress of the transistor. t...

Journal: :Journal of Cosmology and Astroparticle Physics 2022

We present the design, manufacturing and performance of horn-switch system developed for technological demonstrator QUBIC (the $Q$\&$U$ Bolometric Interferometer Cosmology). This is constituted 64 back-to-back dual-band (150\,GHz 220\,GHz) corrugated feed-horns interspersed with mechanical switches used to select desired baselines during instrument self-calibration. manufactured horns in alumin...

2016
Kirsten M.W. Findlay Gareth I. Jenkins

The UV RESISTANCE LOCUS 8 (UVR8) photoreceptor specifically mediates photomorphogenic responses to UV-B. Photoreception induces dissociation of dimeric UVR8 into monomers to initiate responses. However, the regulation of dimer/monomer status in plants growing under photoperiodic conditions has not been examined. Here we show that UVR8 establishes a dimer/monomer photo-equilibrium in plants grow...

Journal: :Applied optics 2003
Xuemei Zheng Ying Xu Roman Sobolewski Roman Adam Martin Mikulics Michael Siegel Peter Kordos

We present a novel, free-standing low-temperature GaAs (LT-GaAs) photoconductive switch and demonstrate its femtosecond performance. A 1-microm-thick layer of a single-crystal LT-GaAs was patterned into 5-10-microm-wide and 15-30-microm-long bars, separated from their GaAs substrate and, subsequently, placed across gold coplanar transmission lines deposited on a Si substrate, forming a photocon...

Journal: :iranian journal of science and technology (sciences) 2005
m. h. mahdieh

a three-step selective photo-ionization for gd155 and gd157 isotopes by pulsed laser wasevaluated numerically. due to large thermal neutron absorption cross sections, these two isotopes innatural gadolinium are good candidates as burnable poison to control reactivity early in the fuel cycleand allow extended fuel burn up. rate equations have been used to calculate the dynamics of the isotopepop...

Journal: :Organic letters 2011
Peter Šebej Bum Hee Lim Bong Ser Park Richard S Givens Petr Klán

A clean bifurcation between two important photochemical reactions through competition of a triplet state Type II H-abstraction reaction with a photo-Favorskii rearrangement for (o/p)-hydroxy-o-methylphenacyl esters that depends on the water content of the solvent has been established. The switch from the anhydrous Type II pathway that yields indanones to the aqueous-dependent pathway producing ...

2016
Xin Lin Seyed Sadeghi

Two-dimensional (2D) ZnO inverse opal (IO) films were fabricated by co-assembly of sacrificed polystyrene (PS) microspheres and citric acid/zinc acetate (CA/ZA) aqueous solution at an oil–water interface followed by calcination. Their morphologies could be controlled by the surface property of polymer templates and CA/ZA molar ratio. Moreover, photo-detecting devices based on such films were co...

2008
Bhaskar Choubey Hsiu-Yu Cheng Steve Collins

A wide dynamic image CMOS image sensor with a user adjustable logarithmic photo-response is presented. A pMOS switch and a time-dependent reference voltage are integrated into a three-transistor (3T) pixel structure to implement a logarithmic response. Several pixels have been manufactured using a 0.25μm standard CMOS technology. Compared to the conventional logarithmic response pixel based on ...

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